diff options
| -rw-r--r-- | drivers/irqchip/irq-loongson-pch-lpc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-loongson-pch-lpc.c b/drivers/irqchip/irq-loongson-pch-lpc.c index bf2324910a75..9b35492fb6be 100644 --- a/drivers/irqchip/irq-loongson-pch-lpc.c +++ b/drivers/irqchip/irq-loongson-pch-lpc.c @@ -13,6 +13,7 @@ #include <linux/irqchip/chained_irq.h> #include <linux/irqdomain.h> #include <linux/kernel.h> +#include <linux/syscore_ops.h> /* Registers */ #define LPC_INT_CTL 0x00 @@ -34,6 +35,7 @@ struct pch_lpc { u32 saved_reg_pol; }; +static struct pch_lpc *pch_lpc_priv; struct fwnode_handle *pch_lpc_handle; static void lpc_irq_ack(struct irq_data *d) @@ -147,6 +149,26 @@ static int pch_lpc_disabled(struct pch_lpc *priv) (readl(priv->base + LPC_INT_STS) == 0xffffffff); } +static int pch_lpc_suspend(void) +{ + pch_lpc_priv->saved_reg_ctl = readl(pch_lpc_priv->base + LPC_INT_CTL); + pch_lpc_priv->saved_reg_ena = readl(pch_lpc_priv->base + LPC_INT_ENA); + pch_lpc_priv->saved_reg_pol = readl(pch_lpc_priv->base + LPC_INT_POL); + return 0; +} + +static void pch_lpc_resume(void) +{ + writel(pch_lpc_priv->saved_reg_ctl, pch_lpc_priv->base + LPC_INT_CTL); + writel(pch_lpc_priv->saved_reg_ena, pch_lpc_priv->base + LPC_INT_ENA); + writel(pch_lpc_priv->saved_reg_pol, pch_lpc_priv->base + LPC_INT_POL); +} + +static struct syscore_ops pch_lpc_syscore_ops = { + .suspend = pch_lpc_suspend, + .resume = pch_lpc_resume, +}; + int __init pch_lpc_acpi_init(struct irq_domain *parent, struct acpi_madt_lpc_pic *acpi_pchlpc) { @@ -191,7 +213,10 @@ int __init pch_lpc_acpi_init(struct irq_domain *parent, parent_irq = irq_create_fwspec_mapping(&fwspec); irq_set_chained_handler_and_data(parent_irq, lpc_irq_dispatch, priv); + pch_lpc_priv = priv; pch_lpc_handle = irq_handle; + register_syscore_ops(&pch_lpc_syscore_ops); + return 0; free_irq_handle: |